Question : How much electricity is required to make 1 gallon of liquid hydrogen ? Can anyone help - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.

Question : How much electricity is required to make 1 gallon of liquid hydrogen ? Can anyone help

I am doing some feasability studies for a potential hydrogen generation plant and one of the questions is how big should the wind turbine be.
Specifically How much electricity is required to make 1 gallon of liquid hydrogen ?

Better question to ask on sci.chem.
You'll have the following items to concern yourself with:
1) release of hydrogen from hydrocarbons (the current least expensive
method)
2) drop the temperature of the gas from roughly ambient to the "boiling
point"
3) remove the "latent heat of vaporization"

The last two steps will have to include some efficiency estimations, for
the real world. The numbers you find for hydrogen will be under ideal
circumstances. Some gasses are compressed to very high pressures, cooled
to ambient temperature, then the pressure is dropped to the point that
condensation will occur. This likely will not be done with hydrogen...

And internet search using "liquid hydrogen" and "energy requirement" yields
a manageable number of hits...[Only registered users see links. ]

Question : How much electricity is required to make 1 gallon of liquid hydrogen ? Can anyone help

steve mew wrote:

Minimum of one electron per hydrogen atom. It sounds like you intend to use
a wind turbine to generate electricy to separate water into hydrogen and
oxygen. The real question is why would you do that? There is more than
enough hydrogen in natural gas to supply all the worlds needs for thousands
of years, if we don't waste it.